Frankfurter

Returns the first and last dates on which a rates request with the same base, quotes and providers would actually return a record, as {base, quotes, providers, start_date, end_date}.

Returns the catalogue of supported currencies, each with its ISO alphabetic and numeric code, English name, symbol and the first and last dates it was published.

Returns one currency's record: ISO alphabetic and numeric codes, English name, symbol, first and last publication dates, and the list of provider keys that publish it.

Returns the exchange rates for one specific calendar date as an array of {date, base, quote, rate} records, carrying the last published value forward over weekends and holidays.

Returns the most recent exchange rate for every currency pair against one base, as an array of {date, base, quote, rate} records blended across all contributing central banks.

Returns one institution's record: name, country, rate type (reference rate, interbank middle rate, and so on), pivot currency, source and terms URLs, cadence and the currencies it publishes.

Returns all 105 source institutions with key, name, country, rate type, pivot currency, data and terms URLs, publication cadence and the full list of currencies each one publishes.

Returns one object - {date, base, quote, rate} - for a single pair, rather than an array of every pair against a base.

Returns every published rate between a start date and today (or an explicit end date) as a flat array of {date, base, quote, rate} records, with non-publication days simply absent.